Grinding-mill.



. MAY.

Patentad Apr. 2, 1918.

2 SHEETS-SHEET I INVENTOR NITNESSES ATTORNEY E. MAY.

GRINDlNG MILL.

APPLICATION FILED MAR. 13. I917. 1,261,583. Patented Apr. 2, 1918.

2 SHEETS-SHEET 2.

ATTORNEY WITNESSES EMER'Y EUGENE MAY, OF CHAMBERSBURG, PENNSYLVANIA.

GRINDING-MILL.

To all whom it concern Be it known that I, EMERY EUGENE MAY, a citizen of the United States, residing at Ghambersburg, in the county of Franklin and State of Pennsylvania, have invented new and useful Improvements in Grinding- Mills, of which the following is a specificat-i-on.

This invention relates to a grinding mill which is especially adapted for the reduction of middlings for the sifting process although the construction of the mill is such that it may be advantageously employed for other purposes when the occasion requires.

The primary object of the invention is to provide a mill of this character in which the floury and fibrous matter in the middlings passed therethrough may be more quickly and satisfactorily separated than is possible with machines for this purpose now in use and in such a manner that the flour produced from the reduced middlings by the sifting operation is improved in color.

With these and other objects in view, the invention resides in the novel combination and arrangement of parts, which will be hereinafter described and particularly point ed out in the claim.

The preferred embodiment of the invention has been illustrated in the accompanying drawings, although no restriction is necessarily made to the precise details of construction therein shown, as changes, alterations, and modifications, within the scope of the claim may be resorted to when desired.

In the drawings:

Figure l is a view in elevation partly in section of a grinding mill constructed in accordance with the invention.

Fig. 2 is a vertical transverse section on the line 22 of Fig. 1.

Fig. 3 is a vertical transverse section on the line 33 of Fig. 1.

Fig. 4 is a detailed view of the pressure disk and showing the same removed from the mill.

Fig. 5 is a detailed view of the grinding ring.

Like characters of reference denote corresponding parts throughout the several views in the drawings.

Referring now to the drawings in detail, the letter A designates a grinding mill constructed in accordance with the invention Specification of Letters Patent.

Application" filed. March 13, 1917-.

Patented Apr. 2,. 1918 SeriaI'No'. 154,543.

and in which a base 5 is provided with bearings 6 in which is mounted to turn a shaft 7 one end of which has fixed thereto a drive wheel 8.. The other end of the shaft 7 ex tends within a casing- 9 also mounted upon the base and ha ing formed thereon a feed hopper 10'.

Arranged within the casing 9 and fixed to the shaft 7 is a spiral conveyer 12,- the purpose of which is to convey the middlings passing through the feed hopper 10 toward the open end 13 of the casing 9.

A reversible grinding ring 14 is detachably connected with the open end 13 of the casing 9 by screws 15 and extends within a hood 16 detachably connected with the easing 9 and having formed thereon a discharge spout 17.

Extending transversely of the hood 16 are a plurality of spaced guide rods 18 having arranged therebetween a pressure disk 19 slidably connected with the 'uide rods 18 by radially extending arms 20 through openings 20 in which pass the rods 18. The eripheral surface of the pressure disk 19 is eveled as at 21, and yieldably held in engagement with an edge on the grinding ring 14 by a coiled expansion spring 22 interposed between the disk 19 and the end wall of an extension 23 on the hood 16. A central boss on one side of the disk extends within the spring 22 and supports one end thereof, the other end of the spring being supported by the extension on the hood.

Through the arrangement of the grinding ring 14, a chamber 24 is formed between an end of the conveyor 12 and pressure disk 19 into which the middlings are packed by the conveyer 12 and pressed by the pressure plate 19 against the said end of the conveyer to such an extent that the floury and fibrous matter in the middlings is separated and caused to pass through the discharge opening 25 formed between the beveled face of the disk 19 and an edge of the grinding ring 14 by the packing of the middlings within said chamber.

To permit the pressure of the disk 19 against the middlings in the chamber 24 to be regulated, a screw 26 is adjustably mounted in the extension 23 and has secured to its shank a follower 27 hearing against an end of the spring 22.

When the mill is in use, the middlings are passed through the hopper 10 and into the casing 9, through which they are conveyed by the conveyer 12 and packed within the chamber 24:, such packing of the middlings within the chamber 24 causing the plate 19 under the influence of the spring 22 to exert a suflicient pressure upon the same to cause the floury and fibrous matter in the middlings to become separated and pass through the discharge opening 25 and into the hood from which said matter escapes through the discharge spout 17.

From the foregoing description, taken in connection with the accompanying drawings, it is at once apparent that a grinding machine has been provided which is highly efficient for the purpose set forth and requires only a minimum amount of power for its operation in comparison to the, machines for this. purpose now in use.

Having thus described the invention, what is claimed as new, is: V

In a grinding mill, a conveyor casing, a hood having a central opening in one side thereof into which said casing extends, a central extension upon the opposite side of said hood, a coil expansion spring within said extension extending within said hood, rods in said hood arranged concentrically of said spring, a disk in said hood having a i beveled peripheral edge, radially extending arms on said disk having openings therein through which said rods are passed, a central boss on one side of said disk extending within said spring, and a screw engaging said spring adjustably mounted in said extension.

-In testimony whereof I aflix my signature.

EMERY EUGENE MAY.

Sonics of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

